Q1) Select the mismatch  (NEET 2017)

Frankia                         Alnus
Rhodospirillum           Mycorrhiza
Anabaena                    Nitrogen fixer
Rhizobium                    Alfa-alfa





Q2) In which of the following, all three are macronutrients? (NEET 2016, PHASE I)

Iron ,Copper, Molybdenum
Molybdenum, Magnesium, Manganese
Nitrogen, Nickel, Phosphorous
Boron, Zinc, Manganese





Q3) Which is essential for the growth of root tip?  (NEET 2016, PHASE II)

Zn
Fe
Ca
Mn





Q4) During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by  (CBSE AIPMT 2015)

Leghaemoglobin
Xanthophylls
Carotene
Cytochrome





Q5) Deficiency symptoms of nitrogen & poatassium are visible first in (CBSE AIPMT 2014)

Senescent leaves
Young leaves
Roots
Buds





Q6) The first stable product of fixation of atmospheric nitrogen in leguminous plants is (NEET 2013)

NO¯₂
Ammonia
NO¯₃
Glutamate





Q7) Which one of the following is correctly matched? (CBSE AIPMT 2012)

Passive transport of nutrients – ATP
Apoplast – Plasmodesmata
Potassium – Readily immobilisation
Bakane of rice seedings – F Skoog





Q8) Which one of the following helps in absorption of phosphorous from soil by plants?  (CBSE AIPMT 2011)

Rhizobium
Frankia
Anabaena
Glomus





Q9) The function of leghaemoglobin in the root nodules of legumes is  (CBSE AIPMT 2011)

Oxygen removal
Nodule differentiation
Expression of nif gene
Inhibition of nitrogenase activity





Q10) Nitrifying bacteria   (CBSE AIPMT 2011)

Convert free nitrogen to nitrogen compounds
Convert proteins into ammonia
Reduce nitrates to free nitrogen
Oxidise ammonia to nitrates




Q11) Which one of the following elements in plants is not remobilised?  (CBSE AIPMT 2011)

Calcium
Potassium
Sulphur
Phosphorous





Q12) Which one of the following is not a micronutrient?  (CBSE AIPMT 2010,03)

Molybdenum
Magnesium
Zinc
Boron





Q13) An element playing important role in nitrogen fixation is (CBSE AIPMT 2010)

Molybdenum
Copper
Manganese
Zinc





Q14) The common nitrogen-fixer in paddy fields is  (CBSE AIPMT 2010)

Rhizobium
Azospirillum
Oscillatoria
Frankia





Q15) Manganese is required in  (CBSE AIPMT 2009)

Nucleic acid synthesis
Plant cell wall formation
Photolysis of water during photosynthesis
Chlorophyll synthesis




Q16) Nitrogen fixation in root nodules of Alnus is brought about by  (CBSE AIPMT 2009, 08)

Bradyrhizobium
Clostridium
Frankia
Azorhizobium





Q17) Which of the following is a flowering plant with nodules containing filamentous nitrogen fixing microorganism? (CBSE AIPMT 2007)

Casuarina equisetifolia
Crotalaria juncea
Cycas revoluta
Cicer arientinum





Q18) Which one of the following elements is not an essential micronutrient for plant growth? (CBSE AIPMT 2007)

Mn
Zn
Cu
Ca





Q19) A plant requires magnesium for (CBSE AIPMT 2007)

Holding cells together
Protein synthesis
Chlorophyll synthesis
Cell wall development





Q20) The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic & mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic & mitochondrial electron transport? (CBSE AIPMT 2005)

Co, Ni, Mo
Ca, K, Na
Mn, Co, Ca
Cu, Mn, Fe





Q21)  A free living, nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (CBSE AIPMT 2004)

Tolypothrix
Chlorella
Nostoc
Anabaena





Q22) The major role of minor elements inside living organisms is to act as (CBSE AIPMT 2003)

Binder of cell structure
Cofactors of enzymes
Building blocks of important amino acids
Constituent of hormones




Q23) Boron in green plants assists in (CBSE AIPMT 2003)

Sugar transport
Activation of enzymes
Acting as enzyme cofactor
Photosynthesis





Q24) Greyspots of oat are caused by deficiency of (CBSE AIPMT 2003)

Fe
Cu
Zn
Mn





Q25) The major portion of the dry weight of plants comprises of (CBSE AIPMT 2003)

Carbon, hydrogen & oxygen
Nitrogen, phosphorous, & potassium
Calcium, magnesium, & sulphur
Carbon, nitrogen & hydrogen





Q26) Choose the correct match (CBSE AIPMT 2002)

  Bladderwort,  sundew, venus fly trap
   Nepenthes, Dionea, Drosera
  Nepenthes, Utricularia, Vanda
  Utricularia, Drosera, Dionea
 Dionea, Trapa, Vanda





Q27) Passive absorption of minerals depend on  (CBSE AIPMT 2001)

Temperature
Temperature & metabolic inhibitor
Metabolic inhibitor
Humidity





Q28) Enzyme involved in nitrogen assimilation (CBSE AIPMT 2001)

Nitrogenase
Nitrate reductase
Transferase
Transaminase





Q29) In plants inulin & pectin are   (CBSE AIPMT 2001)

Reserved food material
Wastes
Secretory material
Insect attracting material





Q30) Which aquatic fern performs nitrogen fixation?  (CBSE AIPMT 2001)

Azolla
Nostoc
Salvia
Salvinia




Q31) Zinc as a nutrient is used by the plants in the form of  (CBSE AIPMT 2000)

Zn
Zn²⁺
ZnO
ZnSO₄





Q32) The plants grown in magnesium deficient but urea sprayed soil would show  (CBSE AIPMT 2000)

Deep green foliage
Early flowering
Yellowing of leaves
Loss of pigments in petals





Q33) Which of the following is not caused by deficiency of mineral nutrition? (CBSE AIPMT 1997)

Necrosis
Chlorosis
Etiolation
Shortening of intermodes




Q34) Which of the following is a free living aerobic, non-photosynthetic nitrogen fixer?  (CBSE AIPMT 1997)

Rhizobium
Azotobacter
Azospirillum
Nostoc




Q35) The core metal of chlorophyll is  (CBSE AIPMT 1997)

Iron
Magnesium
Nickel
Copper





Q36) Which one of the following is not an essential element for plants?  (CBSE AIPMT 1996)

Potassium
Iron
Iodine
Zinc




Q37) Which one of the following is a micronutrient for plants?  (CBSE AIPMT 1996)

Calcium
Magnesium
Manganese
Nitrogen




Q38) Which of the following can fix atmospheric nitrogen?  (CBSE AIPMT 1995)

Albugo
Cystopus
Saprolegnia
Anabaena




Q39) Phosphorous & nitrogen ions generally get depleted in soil because they usually occur as  (CBSE AIPMT 1989)

Neutral ions
Negatively charged ions
Positively charged ions
Both positively & negatively charged but disproportionate mixture




Q40) Minerals absorbed by roots move to the leaf through (CBSE AIPMT 1988)

Xylem
Phloem
Sieve tubes
None of these